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Scottish Health Survey - topic report: lung function

This report presents data from objective measurement of lung function in adults, measured by portable spirometers, using data from the 2008-

2011 Scottish Health Surveys.

This document is part of a collection


Table 2.1 FEV1, FVC, and FEV1/FVC,a,b 2008-2011 combined, by age and sex

Aged 16 and over with a valid lung function measurementc 2008 - 2011 combined
Lung function Age Total
16-24 25-34 35-44 45-54 55-64 65-74 75+
% % % % % % % %
Men
FEV1
Mean % predicted 95.9 97.2 98.9 96.6 92.8 91.5 79.8 94.7
Standard error of the mean 2.25 1.28 1.06 1.55 1.28 2.12 2.55 0.63
At or above 5th centiled 85 91 91 84 82 78 63 84
Below 5th centile 15 9 9 16 18 22 37 16
Below 2.5th centile 10 7 4 13 15 17 33 12
FVC
Mean % predicted 97.9 97.8 98.1 99.0 93.5 96.0 87.1 96.5
Standard error of the mean 1.47 1.23 1.04 1.53 1.18 1.54 2.12 0.56
At or above 5th centiled 91 90 88 83 81 81 69 85
Below 5th centile 9 10 12 17 19 19 31 15
Below 2.5th centile 7 6 6 11 10 9 17 9
FEV1/FVC
Mean % predicted 96.8 100.5 101.8 98.2 98.5 92.8 90.1 97.9
Standard error of the mean 2.00 1.15 0.75 1.07 0.96 1.54 2.37 0.51
At or above 5th centiled 90 93 96 89 88 81 75 89
Below 5th centile 10 7 4 11 12 19 25 11
Below 2.5th centile 8 5 3 9 9 14 21 8
Probable airflow limitation (%)e 7 4 2 7 7 15 22 7
Aged 16 and over with a valid lung function measurementc 2008 - 2011 combined
Lung function Age Total
16-24 25-34 35-44 45-54 55-64 65-74 75+
% % % % % % % %
Women
FEV1
Mean % predicted 98.9 99.5 96.3 94.3 90.5 92.9 85.1 94.4
Standard error of the mean 2.36 1.46 1.56 1.25 1.56 2.30 3.03 0.79
At or above 5th centiled 84 89 87 84 76 75 60 81
Below 5th centile 16 11 13 16 24 25 40 19
Below 2.5th centile 8 7 10 13 19 23 36 15
FVC
Mean % predicted 99.9 101.9 98.5 96.6 96.9 99.9 95.0 98.4
Standard error of the mean 1.97 1.41 1.33 1.10 1.40 1.79 2.72 0.67
At or above 5th centiled 85 88 87 83 82 88 78 84
Below 5th centile 15 12 13 17 18 12 22 16
Below 2.5th centile 9 6 7 9 6 2 3 7
FEV1/FVC
Mean % predicted 97.8 97.2 97.3 97.6 93.4 90.8 87.8 95.1
Standard error of the mean 1.08 0.71 0.96 0.81 1.12 1.25 1.67 0.44
At or above 5th centiled 90 92 87 87 78 78 73 84
Below 5th centile 10 8 13 13 22 22 27 16
Below 2.5th centile 7 7 10 10 16 17 22 12
Probable airflow limitation (%)e 7 4 6 8 14 18 25 10
Aged 16 and over with a valid lung function measurementc 2008 - 2011 combined
Lung function Age Total
16-24 25-34 35-44 45-54 55-64 65-74 75+
Bases (weighted):
Men 2008-2011 279 306 333 350 310 201 132 1911
Women 2008-2011 269 284 357 380 315 228 200 2032
Bases (unweighted):
Men 2008-2011 123 190 283 327 354 285 172 1734
Women 2008-2011 173 262 395 439 414 312 221 2216

a FEV1: Forced expiratory volume in one second; FVC: Forced vital capacity; FEV1/FVC: FEV1 as a proportion of FVC

b No bronchodilator was given in this survey

c This table is based on participants in white ethnic groups only. The Stanojevic All Age 2009 equations, applicable to white (Caucasian) populations, were used to determine the predicted values for spirometry measurements in this chapter. ERS Global Lungs Initiative ethnic-specific reference equations that will also cover other ethnic groups were not available at the time of analysis, and therefore participants from non-white ethnic groups were excluded from the analysis shown here

d Centiles show the position of these parameters within a statistical distribution in a normal (healthy) population. If a parameter is on the 5th centile, this means that for every 100 people, 5 would be expected to be at or below that level and 95 above

e Probable airflow limitation: Both FEV1 and FEV1/FVC below the 5th centile

Contact

Email: Julie Landsberg

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